Engel fridge MT17F-G4

Submitted: Friday, Jun 30, 2017 at 17:47
ThreadID: 135181 Views:2955 Replies:9 FollowUps:8
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Hi there, I have an 12 Volt Engel fridge with the above Model number
It runs no problem at all on 240 volt power But when connected to 12 volt power Does not get cold,, Any Ideas? I am thinking maybe a capacitor on the P.c board?
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Reply By: Member - Stephen L (Clare SA) - Friday, Jun 30, 2017 at 18:21

Friday, Jun 30, 2017 at 18:21
Hi Craig

If the fridge is cooling on 240 and nothing on 12 v sould like you have power supply problems.

The fridge was not spiked by a cheap generator?



Cheers



Stephen
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Follow Up By: Craig L1 - Friday, Jun 30, 2017 at 18:30

Friday, Jun 30, 2017 at 18:30
we do have a Honda Eui 20 Genny but the fridge has always been connected to 12volt or normal volt and not the genny
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Follow Up By: Member - Stephen L (Clare SA) - Friday, Jun 30, 2017 at 19:00

Friday, Jun 30, 2017 at 19:00
Hi Craig

Your Honda would not be the cause, as they are a quality generator,.

Have it checked out and it could be something simple.

Good luck


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Reply By: Allan B (Sunshine Coast) - Friday, Jun 30, 2017 at 22:33

Friday, Jun 30, 2017 at 22:33
.
Why are you thinking that it "maybe a capacitor on the P.c board?"
Does one of them look 'funny'?
Why not a resistor on the board, or a transistor, or an integrated circuit, or.....?
It's a bit like saying "my car won't start, what's wrong with it?"

The only way to determine the cause of the problem is to carry out logical troubleshooting. If you cannot do this then enlist the assistance of someone who can.
Cheers
Allan

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Reply By: Tony F8 - Saturday, Jul 01, 2017 at 07:34

Saturday, Jul 01, 2017 at 07:34
Have a look where the power leads plug in, there is a blade fuse there, that could have blown, mine did the same thing till I replaced the fuse
AnswerID: 612263

Follow Up By: Allan B (Sunshine Coast) - Saturday, Jul 01, 2017 at 11:10

Saturday, Jul 01, 2017 at 11:10
Tony, did you determine what caused the fuse to blow?
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Allan

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Reply By: Tony F8 - Saturday, Jul 01, 2017 at 16:48

Saturday, Jul 01, 2017 at 16:48
Allan, it was more a case of corrosion of the fuse itself, as you well know moisture and electrical current create corrosion, I possibly should have been more precise, but was hoping to get the op to check it, a lot of people don't realise there is actually a fuse there.
AnswerID: 612270

Reply By: Member - Roachie - Saturday, Jul 01, 2017 at 21:23

Saturday, Jul 01, 2017 at 21:23
First things first......try another 12 volt cable (can you borrow one from another Engel owner?). They have a habit of breaking an internal wire connection over a period of time.

Once you're sure your cable is okay (ie: trying another cable from a known "good" 12 volt source doesn't fire it up), then you should start looking at the fridge's internals (circuit board, plug recepticle etc.).

Good luck

Roachie
AnswerID: 612274

Reply By: Craig M1 - Saturday, Jul 01, 2017 at 22:39

Saturday, Jul 01, 2017 at 22:39
Hi Craig
Further to the other comments, my engel lead has a fuse concealed in the plug that goes into the cigarette socket.
It blows from time to time . May be worth checking.
Cheers Craig
AnswerID: 612277

Follow Up By: Craig L1 - Saturday, Jul 01, 2017 at 23:42

Saturday, Jul 01, 2017 at 23:42
Hi Craig, the Fuse is ok as there is 12volt power getting to the Fridge, but it is not getting cold or staying cold on 12v so im now thinking the P.c board or the Thermostate
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Follow Up By: Malcom M - Monday, Jul 03, 2017 at 06:44

Monday, Jul 03, 2017 at 06:44
Or maybe take it to someone and get it repaired properly
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Follow Up By: Allan B (Sunshine Coast) - Monday, Jul 03, 2017 at 15:21

Monday, Jul 03, 2017 at 15:21
.
.
Craig L1,

Can you tell me exactly how you know "there is 12volt power getting to the Fridge"? And exactly where did you measure it?
What was the measured voltage? What did you use to measure the voltage?
How is the fridge connected to the vehicle battery?
And most importantly, have you previously operated the fridge OK with the present 12v cable and from the present 12v socket or source?

The answers are important information for troubleshooting. I'm trying to help you here.

Cheers

Allan
Cheers
Allan

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Reply By: AJC - Monday, Jul 03, 2017 at 14:49

Monday, Jul 03, 2017 at 14:49
Hi Craig,
The Engel is a 12Volt DC fridge (also does 24V DC), so if it works on 240V AC then this automatically means the DC circuitry (12V) is working. (to work off 240V AC this voltage is converted to 12V DC internally).
So nothing on the DC circuit board is faulty - look elsewhere.
Most likely (as suggested by others) a faulty DC cable or fuse, perhaps even a plug or socket on the DC side of things.
Cheers
AJC
AnswerID: 612299

Follow Up By: Member - Roachie - Monday, Jul 03, 2017 at 15:41

Monday, Jul 03, 2017 at 15:41
I agree.

The OP's problem though, is that fridge isn't getting cold on 12 volts, but does on 240v. On 12 volts he has an indication (lights?) that power is "there", just not running the motor and getting cold.

There maybe a partially severed wire inside the plug which is allowing enough juice through to activate the green LED on top and/or the internal lamp, but isn't allowing enough juice through to fire-up the compressor motor.

Like I said earlier.....see if you can borrow somebody else's 12 volt cable and try that.

Also, worth checking the power supply to the cigi socket (or dedicated Engel receptacle if one is fitted)....as there could be a case of insufficient power available. This can commonly occur when somebody uses a factory-fitted cigi socket in the back of a Japanese wagon.....the cabling to those sockets has to travel around 6 meters from the front of the vehicle and is about the thickness of the cotton grandma uses to mend your old jocks!!!

Roachie
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Reply By: Craig L1 - Monday, Jul 03, 2017 at 18:24

Monday, Jul 03, 2017 at 18:24
Hi Guys, So I have tested the Fridge on Another car and Another Spare 12 volt power Lead that we have ( we have 2 Engels), and it does the same thing
I have connected our spare Engel Fridge to where the faulty fridge was and the spare fridge runs no problem at all,
Secondly, being Refrigeration Technicians we have all the testing gear in Fluke Multi metres and so on, I have also Inspected the 12 volt P.c board for any burn marks and so on and it is clean
AnswerID: 612301

Follow Up By: Allan B (Sunshine Coast) - Monday, Jul 03, 2017 at 18:39

Monday, Jul 03, 2017 at 18:39
.
In that case Craig, it looks certain that the problem lies within the fridge. The 230v supply is reduced to 12v and supplied to the control board, but just because the 230v works OK does not mean that the control board is fully OK as these two 12v inputs enter on a differing part of the circuit.
Also, visual inspection of the board may not reveal any faults.... a fault does not always leave visual evidence.

However, there could be a problem in the connection of the 12vdc at the fridge input socket or in the wiring of this 12v to the control board. Try connecting the 12v then use your meter to find 12v at the back of the plug and on the input connections on the control board. If no 12v on the board then the problem is with the input plug/socket or the wiring to the board. If there is 12v on the board and it still does not run, then you likely have a faulty board.
As far as I know, the fridge uses only one thermostatic sensor so if the fridge works on 230vac then this must be OK.
Cheers
Allan

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Reply By: Craig L1 - Monday, Jul 03, 2017 at 19:04

Monday, Jul 03, 2017 at 19:04
Hi Allan, yea that is what I am thinking, i will check it out in the next day or two and see what the voltage is
cheers Craig
AnswerID: 612303

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